How to minimize all child process for general process C#

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I am trying to minimize all child processes windows from c# code

Application.openforms return 0 length.

Thanks in advanced

What I have tried:

foreach (Form f in Application.OpenForms)
              {

                      f.WindowState = FormWindowState.Minimized;

              }

Posted 16-Jun-19 21:30pm

Ameer Salah

Updated 16-Jun-19 21:46pm

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2 solutions

Solution 1

Normally, a Application.OpenForms Property (System.Windows.Forms) | Microsoft Docs[^] should do the job, but...

The reason of such of behaviour has been described here: c# - Application.OpenForms.Count = 0 always - Stack Overflow[^]

Posted 16-Jun-19 21:45pm

Maciej Los

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BillWoodruff 18-Jun-19 15:34pm

+5 very interesting thread on SO

Maciej Los 19-Jun-19 1:51am

Thank you, Bill.

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OriginalGriff · Accepted Answer · 2019-06-16T21:47:00

The code works fine for me, which is exactly what I'd expect.

So you need to do a couple of things:
1) Check when you are executing that code: if it's from a constructor, the forms you want may not be fully initialized yet for example.
2) Check your UIPermission:

Quote:
Caller must have permission to access all windows, as defined by the AllWindows value of the UIPermissionWindow enumeration.

(Application.OpenForms Property (System.Windows.Forms) | Microsoft Docs[^])